NAZI documents that were previously top secret have revealed how German troops plotted invading Britain using pictures from post cards and calendars.

A secret document has revealed how the Nazis planned to invade Britain [NC]

A war dossier dubbed the 'Nazi A-Z of Great Britain’ has uncovered the cities Adolf Hitler wanted to destroy and where the Germans wanted to settle.

It explains how postcards identifying British landmarks were given to troops to prepare them for their planned blitz of the UK.

Iconic sites shown to Hitler's stormtroopers included the Blackpool Tower, the Mersey Tunnel and the Tyne Bridge in Newcastle.

The war dossier has been dubbed the Nazi A-Z of Great Britain [NEWSTEAM]

It's like the Nazi’s A-Z of Britain

Historical documents expert Richard Westwood-Brookes

The top secret document also revealed how high-ranking Nazi officers wanted to live in British stately homes and castles.

The dossier was in preparation of the aborted Operation Sealion.

It was scrapped on September 17 1940 after the Luftwaffe failed to gain supremacy over the RAF in the Battle of Britain.

The documents have been revealed for the first time after it was kept in the same family after the end of the war.

Postcards identifying British landmarks were given to troops to prepare them [NEWSTEAM]

Historical documents expert Richard Westwood-Brookes, of Mullocks Auctioneers, said: "It is a top-secret document which only high ranking officers would have had access to. There's certainly not that many around.

"It details the short and long-term plans that the Germans had for their invasion of Britain.

"From the targets they were going to strike for demolition in order cripple Churchill's war effort to the stately homes high-ranking Nazi officers would reside in once they had conquered.

The dossier was in preparation of the aborted Operation Sealion [NEWSTEAM]

"The plans to strike the south coast as part of Operation Sealion have been well documented previously but this is one of the most detailed examples I have ever seen showing their wider plans for mainland Britain.

"It's like the Nazi’s A-Z of Britain - it has everything from the topography of certain area's to the numbers of homes, schools and hospitals they have."

It will now go up for auction at the Ludlow Race Course where it is expected to fetch up to £500.